Electric welding machine



BEST AVAILABLE COP 1933. F. P. M BERTY ELECTRIC WELDING MACHINE 6 Sheets-Sheet 1 Filed April attorney:

E m v fig; 1

BEST AVAILABLE COP March 7, 1933. F. P. McBERTY ELECTRIC WELDING MACHINE Filed April 22, 1

6 Sheets-Sheet 2 Inw= E MM-"FK dbboznuq;

I I BEST AVAILABLE COP March 7, 1933. F. P. MQBERTY 1,900,834

ELECTRIC WELDING MACHINE Filed April 22, 1929 68heets-Sheet 3 BEST AVMLABLE COP March 7, 1933. F. P. MOBE RTY ELECTRIC WELDING MACHINE Filed April 22, 1929 6 Sheets-Sheet 4 BEST AVAILABLE COP March 7, 3933. F. P. MCBERTY ELECTRIC WELDING MACHINE Filed pril 2, 1929 6 Sheets-Sheet 5 BEST AVAILABLE COP Mafia 7,1933. v F P, McBERTY 1,900,834

ELECTRIC WELDING MACHINE Filed April 22, 1929 6 Sheets-Sheet e Patented Mar. 7, 1933 BEST-AVAILABLE coP NETE FEED r. Mesa-MY,- or WARREN; oHIo minotca o JwELni-Ne' MA HINE l I Application filed ferred tom the art as aflashwelder and has-' even come in some instances tobe referred to" as a combinedflash and buttwelder for the reason that in its-operation one piece'being stationary while the otherfis welded is hel I v advanced towardsit while the electric welding lc'urrent is 'with the result that when the pieces of work? 'comeinto light contact a flash occurs ga'n d {isLmaintained for a short time beforethe pieces of'w'ork are jammed together; and upset under pressure; which the operation is iin" the-nature off last step of alouttweld. w a

The primary object of'the invention is the provision of an electric welding machine o'f a novel construction for'electrically welding sash Oithellkefi r M'Jfmw together the te n r e Stee .scribedwhich-isfiillyautomatic. I A further object of the invention is-the provision in a machine of the character described of welding electrodes pivotally su ported; and adapt'ed'to swinginan'arc when 5 clamping the worl r'inplace upon the dies of the machine? 40" tion is the provision in a machinejof the chartrode leads.

Another and further 'Ob] acter described of novel 1 transformer elec v on the present i'nachi nep ect of the invention is the provision of meanspositively as-* suring'the proper positioning of the work lead, the View being in slde elevation.-

upon the dies of the machine, 1

Another and still further object is the pro vision in a machine of the'character describedf I ofmovable electrodes which throughout their movement move in the same plane-while dies open and closed positions of the electrodes I being' shown in-full and dotted lines'respec Another object of the invention isth'eprovision of a novel mach" e of theeharacter deanddi'ed I sectional View through one of the dies and A still furthe r objectof the'invention is the" provision of a machine-inwhich the support ing means for the electrodes are'water cooled; Another and further object of the inven? iecegf serial. No. 357,062;

are provided which are'positioned at an acute angle to the plane of movement of the electrodes;

--A still further-object'of the invention is the provision of a novel toggle mechanism to operate the swinging electrodes.

Other objects, novel features of; construe-1' tion and improved results of-theinvention will appear from the-following description taken in conjunction with the accompanyingdrawings. 1

In the drawings:

Figure' l" is a top} plan View of a "machine built in accordance with the present inven- -Fi'gure2dsiaiviewin side elevation of the machine. 'j

" Figure 3 is r a vertical sectionafviewtaken on whe -line ofjFigure-Q looking in the direction '-ind i'cated"byarrows.

{Figure 4e is-aplan view-of the electrodes and dies together with the operating toggle for one ofthe' electrodes; the-view being taken with the machine heads removed and the tively, the position-of the parts being prior to the reciprocation of-the movable electrode I Figure 8'i's a perspective view of Figure Figure Q'is a detached view ofthe electrode carrying arm and the flexible transformer Figure 10 is'a fragmentary view ofthe parts appearingin Figure 9 the view being taken at right angles to that of the other figur'e,"the two positions assumed by the trans- 3 in the machine and removing the work from former lead being shown in full and dotted lines. 1

Figure 11 is a view in elevation of the edge of one of the transformer leads prior to its application to the machine.

The present machine is designed and constructed for the purpose of providing a fully automatic. electric welder for welding to? gether the mitred corners of steel sash and work of a similar nature as will more clearly appear hereinafter and particularly under the heading of Operation of the Machine.

In the present machine the clamping and releasing of the work isdone by means of.

conveniently placed foot or hand levers controlling the delivery of air to the cylinders the pistons of which operate the swinging electrodes while the starting of the motor and the operation of the machine is'accomplished by the mere pushing of the button switch which causes the: machine to automatically go through a cycle of operation to make a complete weld.

The machine is-further equipped with .an automatic brake for'arresting-.-all motion of the machine at the end of each cycle of operation.

-Other features of the machine which: will be.dealt-with more-specifically are that the dies which are of steel are fully insulated.

from the platens or any electrical connection with the rest of the parts which go into the make-up of the machine and that the clamp- 35 ingof the work is done by copper electrodes which are also inthe nature of dies, which electrodes are pivotally mounted to swing in an arc-for clamping and releasing the work upon the steel dies. The construction of the dies and; the electrodes is such-that an even-- heating of the welds isassured andallslid-1 inggibbed members'orconstructions of a similar nature which would cause frictional. wear. between the electrodes and the dieshas been eliminated so that the life of the dies and the electrodes is increased many fold.

- It will further appear that means are provided for positively assuring the proper positioning of the work so thatwhen a sash is completely welded-it is of the proper size to fit the opening for which it is intended.

The machine illustrated in the accompanying drawings is geared so that the welding cycle is approximately seven seconds and when the manual operation of placing work the machine is included it has been found in practice that this machine can perform two hundred and forty welds per hour although the exact number of welds per hour will vary 60" .operator.

somewhat with conditions and the skill of the The steel dies are tilted or set at an angle to the plane in which the electrodes swing and the exact angle of the steel dies is dependentupon the shape of the cross sectional BEST AVAILABLE COP configuration of the sections or work being welded. In some instances the steel dies are tilted at a 12 degree angle while at others they are tilted at as much as a 23 degree angle.

Having pointed out some of the more salient features of improvement of this machine over those now known and having called attention to some of the objects and improved results accomplished by the machine, detailedand specific description of the con struction of the machine will now be given.

Although this machine has been described as being particularly designed for welding together work having mitered ends it can be readily adapted, without departing from the spirit of the invention, for welding together, pieces of sash or the like having squared ends.

In the drawings I have illustrated a construction embodying the preferred form of my improved welding machine but it will be readily understood that departures from the specific constructions illustrated and described can be made as a matter of mere mechanical skillwithout departing from the spirit of the invention as expressed in the ap-,

pended claims. I

The bed-of the machine is designated at A andissupported-in the usual manner by a plurahty of legs 1; At each side of this base and paralleling-itadjacent its upper edge are slides having central of their length squared portions3 :while at their ends these slides are rounded as at 4 and-reciprocate in the dustless housings or bearings 5.

The particular constructions of these slides and their dustless hearings or housings form no part of. this invention but are the subject matter of-anotherinvention of the present applicant and are fully described in detail in his-copending patent application Serial No. 230,625,.filed November 2nd, 1927, since ma- 1113331 into Patent No. 1,732,136, dated Oct. 15,

At the left hand end of the bed and insulated therefrom is. a fixed support B for the swinging electrode C and the fixed die D while supported upon the squared portions 3 of the slides is the support E for the movable and swingin electrode F and the moving or sliding die while at the far end of the base is mounted the actuating cam H which works against the roller 16 carried in the bifurcated end-of the link 6 whihc has an upwardly extendingend 7 in adjustable connection with the threaded end of the rod 8 which rod is connected to the vertical shaft 9 which is mounted on the supplemental base member 10 and under the head 11 whereby when the cam is rotated in a manner which will be hereinafter described the supplemental base member 10 carrying the parts E, F and G will be reciprocated longitudinally of the machine it being evident that this supplemental base is bolted to the squared portions3 of the slides as indicated at 12.

For the purpose of keeping flying metallic particles and other foreign matter away from i the cam and from those parts of the machine which lie immediately below I have provided a cover 13 pivotally mounted as at 14 inthc upstanding casting 15 which forms a guideway for this link 6.

ciprocated towards the left end of the ma-' chine by reason of the cam H but. are returned to their normal position in separated reiatlon to the fixed die by hand lever I 22' pivotally connected to a bracket 23 and operatively connected to the fixed plate-24.

The shaft 25 upon which the sprocket wheel 18 is mounted extends outwardly-beyond. the edge of the machinebase and is provided with a brake drum which-the brakebands 28 engage normally in abraking position.

These bands are moved-to a;release d position; by means of an electro-magnet22':mountedintermediate the ends 28 and29 of=the arms 30 and 31 which have operativagconnectionwith the brake band. 4 This electre-magnetis. connected by a lead 32;wit h the remote control switch J, which remote control switch; is of a type weil known and sold on the open marliet and will be described to some extent here1nafter.

This electro-magnet is supported by a suit-' able arm or bracket 33 having connection with the machine proper.

Supported beneath the machine and approximately intermediate its length by suitable rods 34 is the transformer-1K for the welding machine and this transformer is connected with a-suitable source of electric cur-- rent supply.

This transformer is provided with two I flexible leads one of which appears in Figure 2 at 35 with the two electrodes C and F and are of a peculiar and novel design as will appear from the description hereinafter.

The dies utilized in the present machine are of steel and both of them are fully insulated from the machine proper as clearly appears at 36 and 37 in Figure 1 of the drawings so that during the operation of the machine there will be no tendency for the electric current to pit or burn them.

These dies are removably supported upon suitable carriers 38 so that they are interchangeable to make the machine capable of operating upon work of different shapes and as clearly appears in Figure 3 of the draw-' BEST AVAILABLE COP ings the die carriers have a tapered upper face 39 so that the dies are set at an angle to the main base A of the machine.

Each set of dies is particularly shaped to receive and support work of a particular cross sectional configuration and in the present instance the cross sectional configuration of the work appears in Figure 8 wherein the two pieces to be welded together are given numerals 40 and 41.

The pieces 40 and 41 are provided adjacent their ends at a previously determined position with holes to cooperate and receive the outwardly extending pins 42 of the dies so that the work can be ieadily placed upon the dies yet automatically properly positioned thereon.

From a complete reading of the description of this machine and its operation it will be seen that during the operation the ends of the work are burned or flashed away a-pre-- determinedamount and the holes in the pieces of work being operated upon are positioned to cause an extensionof the ends of the pieces- 40 and- 41 a distance beyond the ends of the dies slightly, in excess of the amount which will be burned from them during the welding operation. The extending ends of the pieces 40 and 41 beyondthedies is illustrated in dotted lines 43 in Figure 4 of the drawings;

Describing the electrodes andtheir supports it will be seen that the electrodesC-and' Fremjovably and adjustably mounted in the ends 44 ofthe arms 45 the remote ends of' which are bifurcated to form bearings 46 and 47 which areipivotally mounted as} at 48 and 49, see Figure 3, between the portion 50 of the: supplemental base and the extending-portion- 51 ofthehead.

.{These electrodes are made: of copper and their. complete adjustment and removability are eifected'by reason-of bolts or screws 52; 53 andthe set screwl54. H.

To: effect a swinging movement lief the trodes their respectiyearcs I have provided at; one side of .theimachine cylinders 55 having there'inpistons 56 with elongatedpiston rods 57'havingbifurcated ends 58 pivotallycon-- neeted as at59 .witlrone end of'the a-p'proxi-- mately triangularshaped link 60 the opposite end; of said linkbeing DiVQtallv Pnnnected at 61 with the electrode carrying arm 45 inter mediate the length of'said arm while the apex ofthe'triangular shaped: link 60 is pivotally connected: as at 62 with a link 63 having pivotal connection with the shaft 9.

These linkswhich gointo the make-up of what I have termed-the toggle are-positioned beneath the head 11 and intermediate the head and the supplemental or sliding base.

By reference to Figure 1 the means of supporting the cylinders is indicated as being rods-64 and- 65 in separated parallel relation extending horizontally: outwardly from the sliding supplemcntalbase and provided.

1,900,834- BEST AVAILABLE COP at their ends with a cross head 66. Any'suit solved in a novel manner which was only disable fluid can be used for the operation of. covered after long and tedious experimenthe pistons although air is preferable-and tation. delivered to the opposite-sides of the piston In this connection although I use a flexible head through conduits 67 and 68 from'a suitlead which before application to the maable source of supply (not shown) and conchine is suchv as is commonly known in the trolled preferably by means of foot pedals art and is designated at 35 in Figure 11 of: at the front side of the machine the control the drawings, inventiveconcept inlits appli-- being such that both pistons can be operated cation to this machine is present. I simultaneously or independently as-the de- In weldingmachines where the movement 75 sire of the operator of the machine might inof the electrodes is in a straight line as has dicate. I l l been heretofore the practice the fiexibilityof: Inasmuch as the toggle arrangement and the electrode leads was merely in one direc-i cylinders and cylinder supporting means of tionnamelytransverse thecopper plates of 80 15 both of the electrodes is similar, no duplicawhich the lead is composed. Y

tion of description of these parts is neces In the present machine however it is neces"= sary. sary that the lead have flexibility not only As the electrode and its carrying arm durtransverse the plates which makeup the leads ing the operation of'the machine has a tendbut also have-flexibility longitudinally ofthe' ency to heat up the'operatingarm 45 when plates which go into' the make-up of theflead. 853 east is provided with 'a circulating pipe 69 I have solved this problem; in the manner for conducting through the arm water or indicated iii-Figures 9'and 10 of the'draw some other cooling medium, the cooling me-'= ingsand'aspartially illustrated in Figure 3 dium entering the arms through one conduitof the drawings whereinit will be seen that 7 and circulatingthrough' the} pipe '69- and the ends 7 2jand 73 of the'lea'ds are fastened 993 outwardly through the secondconduit'il. i? to the transformer Kand-to that downward- In considering'the type of fwork upon lyekt'endingportion 74 of theelectrode-carry which thismachine is adaptedto- -operate ing rmas'in such a mannerthat these ends-f the purpose and necessity of the swinging" of the electrodesare in a'plane-at'approxielectrodesand th e positioning of the; dies at matel'y "righ t"angles to the remaining and 1 an angle to the machine will become apmainportion 'of the electrode with thecxef parent. ception of" that part which is inan acute By reference to Figures 6,z7;an'd;8 which bend as indicated at 75 and in respect to that is a fairwillustration of the crosssectional portion ofthe electrode the ends are in the contour of the pieces of work-"upon which" sam'e'planebut'inseparated horizontal rethis machineoperates, it willibe' seen that" lation'thereto; J A J there arela pluralityoffacesf of the work If these-leads were attached in theusual which must becontaetedbythe electrodestof and 'conventional manner; having reference: efiect a complete and perfect wee and by' to FigureQ of the drawings, the ends 7 2- and; reference to Figure 6 particularly it will'be 73f in'stead of 'being fasteneditwthe'vertical 105 seen that'the' presentation ofthe work to the faces of the transforrner' K a'nd the-yertical electrodes at an'angle"efl"ects ai1d assures -a side wall of portion 74 would be attached to: contact practically throughou thefentire th hori zontal iacesoftheseparts'whichI cross sectional-area 02E the -ndof theipi'eces have d'esigiiated as and Yjc: f 1.:151 "1 of material being operateduponandthafi By -attahing the electrode{leads in the: no the electrode when actuated -by the toggle manner il lustjrated and described they'have mechanism swings into proper abuttingafndf thefieeified and necessary 'fiexibility in thei clamping relation with the='worki iwithout two directions mentioned to permit-the moveany frictional wear, which is' liighIy desir-" men't ii the- 'SWinging electrodes but' should able and'ementially necessary tofprevent'the theybemounted in =the-conventional manner} necessityof constantly; repla ing 'bloth' the above described they would not have the Iondies andelectrodes and makes: possible theg'ihi'dinalflexibility necessary'and would lock keeping of the' dies in"alignment;to inainthe electrodes-against movement.- Repeatedtain their holding eflect upon-the work. tests have proven'this-fact I operate upon work of different cross section illustrate the moyement' orfflexible give 'of'" al' configuration this can be effected by the these -electrode leads. {Figure- 9 illustrates replacement in the machine of dies and elec the lead in the'position itassumes' when the trodes of a proper shape to cooperate with movable electrodes are in the positionillus I the cross sectional configuration of the work" trated in Figure 1 of the drawings'or what being welded in the machine. 1 A mi ht be termed unclamped position, where- Due to the peculiar movement of the elecasFigure 10 illustrates theidistortion which trodes which is new in this art in that they takes place in the lead when the electrodes swing in an arc 'the problem of connecting have been swungto the position-shown in Q the electrodes tothe transformer'has been Figures-6,7 and in dotted l nes; in Figur 4- It will be obvious that when 'desirin'g to ln' Fi'g lre and '10 I have attempted w 'of the drawings. Hereit will be seen. that the electrode lead has yielded so that it has In describing the machinelithas been men.

tionedthat the fixed die andfixed electrode J support is at the left hand end of the machine machine.

but it will be readily apparent that the ma.--

chine could be reversed so as tomake itwhat might be termed a right insteadof a left hand yIthas alsov been foundthat ithas sometmes been desirable to shortenthe legs atthat side of'the machine which carries the dies in an amount tobring the-slanting dies in a planehorizontal to thefioorupon which the machine is supported. 'This' is merely done for convenience in feeding or placing upon the dies the work to be operated upon. With the machine as illustrated in the drawings it "is necessary to elevate the outer ends of'the pieceswhich are placed upon the dies where as with the legs of themachine shortened the pieces of work can be held in horizontal plane when placing the ends of the pieces upon the dies which. under some circumstances might I be desirable.

H Another feature of .130

sup-port of the arms carrying the electrodes is ata point in front of or nearer the outer i 'edg'e'of the machine than are the fixed dies.

engage the V-shaped longitudinal in speaking of the electrodes attention is directed to F gure 9 of the drawings where in the cross sectional shape of the holder 7 6 clearly'appears. Here it will be seen'that the other leg 7 6 of the U is tapereduorbeveled to groove 79 in the upper face of the electrode.

Mention has already been made of thepins 2 for automatically positioning the work on the dies and in fill-18601111601101! 1t 1s mentioned that a reverse' construction could be used without departing from the spirit of the invention wherein the dies-would be provi ded with holes to TGCGlVQ pins carried by the work to accomplish the same end of automatically positioning the work on the dies; t

Specific mention. should be made at this time of the construction of the driving or actuating cams H. This cam is shaped so that it will impart to the movable or sliding elec-' .trode and sliding the a gradually increasing speed up to the time when the upsetting of the metal in thewelds occurs by reasonof the enlarged projection or hump 80 of the cam. en-

the roller 16. This cam, revolves clockwise as-indicated by arrow-inFigure 1 of the drawings.

" Operation BESTAVAILABLE cor" 5 the machine is at a stand-still after. the completion of a cycle of operation and is ready to receive the pieces of work or sash 40 and 1 41-1 making up two sides of a sash frame or the like. These pieces 40 and 41 are placed on the fixed steel dies in themanner illustrated in will be seen that the ends 43of the work extend dies.

-outwardlybeyondi the ends of the so The operator o f-the machine now. depresses the outer ends of the foot pedals 81 and. 82

Figure a ofthe drawings with; theholes in the work over. the pins 42 of theqdies andit' which controls. the delivery of air tothe cylinders 55 and this effects a clamping ofthe C and F in the manner illustrated Figures l and 6 of the drawingsso that the work is held tightly in place upon the. dies and the electrode is in firm engagement, throughout the areas. of theends of the work to effect of the operation of the toggles which efi'ect the swingingfof the electrodes intotheir clamped position as this willbe clearly apparent from. an examination ofv Figured ,of

the drawings.

When the electrodes have been swunginto thelr clamping positions the 1 transformer leads have been distorted from the position they as'sumeas illustrated in Figure 9 to that illustrated in Figure 10 of the drawings, I

There are two distinct electric lines running to the machine,gone;for delivering current to the driving motor 21 and the other delivering current to the transformer and both of these circuits are automatically controlled by switches and 'P which are piv- It is not thought a descriptionis necessary even distribution of current and heat to 1 the work at the time the" welding; current is turned on. s

construction to be noted in'this machine is that the point of pivotal otally' mountedjasat' 83 and 8d at the end i of the machine; The switch'O controls the motor circuit and isactuated' by, a suitable cam 85 while the switch Pcontrols the transyformer circuit and is actuated by two cams 86 and 87 all of said cams being adjustably mounted on the vertical shaft 88 which is the-driving shaft for the main actuating cam I-I.-

I When thej machine has completeda. cycle these cams are adjusted to break the circuit to both'the motor andthe transformer so that to; startlthe machine it is necessary to bridge around these switches until'th e electric motor has rotated the shaft '88 to apoint 3 where the cams have, passed out of engagement with the switches O and P so as to per mit these switches to. close,.which they will do because theirnormal position is that of closing the circuits which they control, That v sec workjon the dies byt-he swinging. electrodes {8'5 is to say; springs normally hold these switches in a closed position.

To eiiect the bridging of the current around the switches O and P I have merely usedan equipment which is sold on the open market and commonly found in use on welding machines, and comprises a control box Q conveniently placed on the side of the machine to the hand of the operator. This control box is in turn electrically connected through a suitable wiring 89 with the remote control switch J which is also an electrical device found and sold on the open market.

By operating through the push button the switch in the control box Q the current is delivered to the driving motor and to the electro-magnet 27 so that the brake is released and the cam H is rotated to move the sliding electrode and sliding die towards the stationary electrode and the stationary die.

By proper adjustment cums 86 and 87 will permit the switch P to close at the proper time for the delivery of current to the electrodes from the transformer which is at a time slightly prior to the actual engagement of the work pieces 40 and ll.

The transformer current being in the electrodes G and F an arc will occur between the pieces of work as soon as they come into light engagement and due to the slowly increasing speed of the sliding electrode this are will be maintained up to the time that the raised portion of the cam eifects an upsetting of the ends of the work being welded together, it being understood that, the arc has been maintained a sufficient time to properly heat the ends of the work so that when the upsetting occurs a proper weld will be made.

The enlargement 80 of the cam is of such a length that the roller 16 will drop oil? of its far end immediately upon the proper upsetting of the Work and thecams 86 and S7 controlling the switch P are also positioned to open the switch P and thereby open the transformer circuit at a very slight interval of time after the upsetting occurs.

The cam is also properly positioned to brake the motor circuit through the switch P at the same instant that the roller 16 drops off of the cam enlargement 80, thereby stopping the motor by opening the motor circuit and simultaneously opening the circuit to the electro-magnet 27 which has been energized throughout the cycle of operation thus far described. Immediately the circuit to the electrO-magnet is opened the brake is automatic'ally'applied due to the springs which normally hold the brake in engagement with the brake drum and the application of the brake immediately arrests all movement of the apparatus.

It has been previously mentioned that the amount of metal to be burned from the pieces of work has been. previously determined and the pieces of work elongated an amount equal to that which will be burned or flashed from their ends during the welding operation.

By reference to Figure 5 of the drawings which illustrates the position of the parts upon the completion of a weld, it will be seen that the ends of the pieces of work extend beyond the dies after the weld has been completed, or in other words the work extends when originally placed on the dies an amount greater than that which will be burned from them.

This is done to permit the removal of the work from the dies after the weld has been completed.

In removing the completed weld from the machine the opposite ends of the foot pedal 81 and 82 are depressed to deliver air to the opposite sides of the pistons 56 to return the electrodes to their original or unclamped po sition as shown in Figure l.

The hand lever 22 is then grasped to move the sliding die G slightly towards the fixed die D and this permits the completed weld to be lifted from the dies which would not be possible without this additional movement due to the pins l2 which interlock with the openings in the work pieces.

Upon the removal of the completed weld the sliding electrode and die are returned to their original position, Figure 1, for a ropitition of a cycle of operation, just described, by the operator of the machine through the medium of the hand lever 22.

By reference to Figures 4 and 5 of the drawings it will be seen that when the tog gles have been operated to swing the electrodes into clamping position that the links 60 and 63 are slightly beyond dead center and that this effectively and positively locks the electrode carrying arms against any possible movement whatsoever which would tend to lessen the clamping of the work upon the supports.

Attention is also directed to the fact that as the present machine is designed for the purpose of welding together work pieces having mitered ends the work supporting members or dies are so shaped as to support the work at an angle across the dies so that the mitered ends of the work come into abutment throughout their widths when the movable die and its cooperating electrode are moved towards one another.

From a reading of the description of operation it will be seen that the machine is practically automatic in its operation as there is no manual function in a cycle of operation after the starting button has been once pushed.

Attention is called to the fact that the pivotal support for the swinging electrode carrying arms is outboard ofthemachine in respect to the work dies although this positioning is not absolutely necessary it being only essential that the 'arc'o f swing of the electrode be such that'theelectrodes come into engage- .ment with the'work to clamp and engage it properly without setting up any friction.

Having thus-described my 'invention what I'claimand desire to secure by Letters'Iatenti's":v V r 1. In an" electric welding machine for Welding together two pieces of work by the 7 combined fiash and butt weld method, a pair of supports for said pieces of work, and

means carried by said supports for cooper ating with the parts of said pieces of work supported on said supports to positively properly position the pieces of work upon said supports in a manner to compensatefor the metal burned from said'pie'ces of work during the flashing operation bf the machine. 2. In an electric Welding machine, a fixed work support and a swinging electrode cooperatingtherewith toclamp the work upon .the'support, amovable work support and a' swinging electrode movable and cooperative therewith to clamp the work'upon said sup: port, means to move saidrelectrodes into and out of engagement with said work, and means 3 to move said movable work support and its cooperating electrode towards said fixed support and its cooperatingelectrode to effect a,

welding'together of-the work, clamped upon "and carried by said supports.

, 3.. In an electric welding machine, a: fixed work support and a movable work support,

' swinging electrodes cooperating with said supports to clamp the work upon the same,

means to swing said electrodes .into and out o of engagement with'said work, means to movesaid movable work support and its @0- operating electrode towards said fixed support and its cooperating electrode to efiect a welding together ofthe wcrk clamped upon and carried by said supports, and means to efi'ect a stoppage of the movable'work supj portnioving means immediately upon the completion of the welding operation.

" L'In an' electric welding machine for welding togetherthe mitered endsof pieces of work orimaterial, a pair of work receiving and supporting members, a pairfof electrodes pivotally mountediupon said machine and cooperating with said work supporting meansto clamp the work thereupomsaid work supporting means positioning the work so that their ends can be moved into abut-.

ting relation throughout the width thereof,

and'said work supporting means further positioning and presenting said work to said electrodes at an angle across the plane in which said electrodes move when clamping the'work upon the supports. I I i 5. .An. electric welding machine for welding together the 'mitered ends o'f 'steel sash or similar metal pieces having irregular'cross c section al configuratlon comprising a pair of dies one of which is movable towards the bent upon itself intermediate its length lead bent'at right angle to the legs of U, and said end portions "fastenedto TIAVmLABLE op other," said dies having their faces shaped to I receive and support. said sash members, a pa r of electrodes pivotally mountedand provided with means to swing them into and out 1 of engagement with the work upon said dies for clamping the work in position thereupon and delivering current to the work, and means to move said movable work support towardssaid fixed work support to efieot a welding together of the work clamped upon and carried by said supports.

6. Inan electricwelding machine for .welding together the mitered ends of steel sash or work of a similarfnatureby a come v binedflash and buttweldirig method, comprising a' pair of work supports one .ofwhich is movable in respect to-the other, electrodes pivotally mounted and cooperative withsaid work supports for clamping the work upon the supports and delivering electric welding welding together the ends or" pieces of work by a co mblned flash and butt'weld method, "comprising a pair of Work supportsone of which is movable towards the other,-a pair of pivotally mounted and swinging electrodes for cooperation with said work supports for clamping the work upon said'supports anddelivering electric welding current thereto, cooperative means between said work support and saidpi eces of workjto positive ly properly position the pieces of work uponsaid supports in a manner to compensate for the metal burned from'saidpieces-of work during the welding operation of the machine,

said work supporting means further presenting said work to'saidelectrod'es-at an angle across-"the plane in which said electrodes move,and means tomove said movablework support and the work carried thereby towardssaid fixed work support and the work thereon toefiect a welding together of the ends of thework clamped upon and carried bysaid-supports, 7 I 8. In combination with an electric 'welding machine having a pivotally mounted swingingelectrode and a fixed transformer,

a transformer lead connecting said electrode and'transformensaid transformer lead 7 into said I said the electrode and the transformer respectively, whereby saidelectrode is resilient both trans approximate U-shape, the ends of versely and longitudinally of itself to provide a connection to permit the swinging of said electrode.

9. In an electric welding machine having work supporting means, an electrode pivotally mounted upon said machine, means comprising a toggle made up of a plurality of links for moving said electrode into and out of engagement with said work to clamp the work upon said support, and tie links of said toggle positioned to lock said electrode against movement whenthe electrode is in its clamping position.

10. In an electric welding machine for welding together the corners of metal sash or like pieces having an irregular cross sectional configuration comprising a pair of work re ceiving and supporting members, a pair of electrodes pivotally mounted upon said machine, means to swing said electrodes into and out of engagement with said work to clamp the same upon said work supports, said work supports shaped to receive and engage one side and the be t m of said sash members, and the electrodes shaped to engage the other side of said sash members including the to of the members and the top or upper surface of the bottom of the members, whereby said work is clamped firmly in place and welding current is delivered by the electrode to the entire area of the ends of the sash members.

11. In an electric welding machine having a base, work supporting means on said machine tilted at an angle across the plane of said base, electrodes pivotally mounted in respect to said base and adapted to swing 1n an arc horizontally transverse said base, and means to swing said electrodes into and out of engagement with said work to clamp the same upon said supports and deliver electric welding current to the work.

12. In combination with an electric welding machine having a pivotally mounted and swinging electrode and a fixed transformer, a transformer lead composed of a plurality of thin current conducting plates connecting said electrode and transformer, said plates making up said transformer lead bent upon themselves intermediate their lengths to form an approximate U shape, the ends of said plates bent at a right angle to the legs of said U, and said end portions fastened to the electrode and the transformer respectively, whereby said lead is resilient both transverse and longitudinal of the plates of which it is composed to provide a connection which permits the swinging of said electrode.

13. An electric welding machine for welding together the ends of steel sash or work of a similar nature, comprising a pair of work supports one of which is movable longitudinal of the machine in respect to the other sup port, electrodes pivotally mounted and adapted to swing in an arc transverse said machine to cooperate with said work supports to clamp the work upon the same and deliver electric welding current to the work, said work supports provided with means cooperating with the work to positively position the same with the ends of the pieces of work extending beyond the supports at their adjacent sides, said work supporting means further positioning and presenting said work to said electrodes at an angle across the plane of the arc in which said electrodes swing when clamping the work upon the supports, and means to move said movable work support and the work carried thereby towards the fixed work support and t is work locked thereupon to bring the extending ends of the pieces of work together to effect a welding together of the ends of the work.

1%. An electric welding machine for welding together the ends of steel sections for the production of window sash or work of a similar nature, comprising a pair of work supports one of which is movable towards and away from the other, a pair of electrodes connected with a suitable source of current supply and pivotally mounted to swing in an arc transverse the machine to cooperate with said work supports for clamping the work upon the supports and delivering electric welding current thereto, means to swing said electrodes upon their supports, means carried by said work supports for positively positioning the work so that the ends of the pieces of work extend beyond the supports at the adjacent sides thereof, said work supports further positioning and presenting said work to said electrodes at an angle across the plane of the arc in which said electrodes swing when clamping the work upon the supports, means to move said movable work support and the work carried thereby slowly with gradually increasing speed towards the fixed work support and the work carried thereby and to give to the movable work support a sudden and final rapid movement to bring the ends of the work into abutment and upset 1 the same to effect a welding together of the ends of the work, and means to stop the de livery of current to the electrodes immediately upon the completion of the upset of 11 the ends of the work.

15. In an electric welding machine having work supporting means, electrodes pivotally mounted upon said machine, means to move said electrodes into and out of engagement with said work, said work supporting means positioning and presenting the work to said electrodes at an angle to the horizontal plane in which said electrodes move.

16. In an electric welding machine, a pair upon, and said work supporting means posipivotally mounted and adapted to swing across said base in a horizontal plane "paraliel to the parallel plane of the base, and means to swing said electrodes upon thelr pivotal support into and out of engagement with said work supporting'means to clamp the work upon'saidsupports, for the purpose described.

'18. In an electric welding machine, a fixed work support and a movable work support, means to move said movable worksupport towards said fixed support, a brake normally magnet for releasing said brake, means to energize said magnet, and means for .deenergizing said magnet at a predetermined time, for the purpose described.

19. In an electric welding machine, a fixed work support and a movable work support, mechanical means to bring the work supports together to efiect awelding together of work carried by the supports, a combined spring and electro-magnetically operated brake normally preventing operation of the mechanical means for moving said movable work support, manually operated means to 5 energize the electromagnet to release the angle to the transverse axis of the machine, an electrode mounted to swing in a horizontal arc towards and away from said work holding die, said electrode having arranged in its end a cutout portion extending at an acute angle to its transverse axis, and the end of the electrode adapted to engage'and force work into' abutment with the die 'for the purpose described. g

21. In an electric welding machine, having work supporting means, clamping means pivot-ally mounted in respect to said work supporting means upon said machine to swing in a horizontal plane on'the machlne,

O and means to swing said clamps into and out of engagement with said work, for the 'purpose described. 7

22. In a mechanically driven electricwelding machine wherein the machine has an auto- 5 matic cycle of operation which includes an preventing the operation of said movable, work support moving means, an electrosuppor'ting die for positioning work at an seer avmmsrscoei 9 automatic cutoff of the welding current upon the completion of the weld, 'an eleCtro-magnetic brake automatically brought into operation by said driving means for stopping said driving means at the end 'of each-cycle of operation in a proper position to permit a loading of the machine with, work preparatory to another cycle of operation.

23. In an' electric welding machine for welding together pieces having an irregular cross sectional configuration, comprising a pair of work receiving and supporting mem-' bers, a pair of electrodes, means "to clamp the work between the work supports and the electrodes, and said work supports and'said electrodes shaped to surround. and engage the faces of said irregular shaped pieces of work and deliver welding current to the entire cross isectional area of said pieces at the points where they are clamped.

24. In an electric "welding machine, a pair of electrodes pivoted'on the machine so as to be capable of swinging movement ina sub stantially horizontalplane relative to a pair "of work supports, the said work'supports presenting the work to the electrodes at an ang'leto the substantially horizontal plane in which the electrodes move, and means to movethe work into engagement to effect an electric welding thereo '25. In an electric-welding machine, a

swinging copper electrode, a fixed steel work support on said machine and insulated therefrom, and means to swing said electrode to clamp work upon the support and deliver current thereto, whereby; said electrode is a clamp for and the sole current conductor to the work.

26. An electric welding machine comprismga horizontal base,.work supporting means mounted upon said base at an angle across the horizontal plane thereof, said work supporting means adapted to support pieces of work in a horizontal plane and at a forty-five degree angle in respect to one another, one of said work holders movable in respect to the other, electrodes movably mounted and adapted to be moved across said base in a horizontal plane parallel to the plane of the base and to engage the work upon the work supporting means and clamp the same thereupon and deliver welding current thereto, and means to move the movable work supporting means towards the other worksupporting means to bring the ends of the work together to effect a welding thereof. r

ing machine having an automatic vcycle of operation, a brake brought into operation by said machine driving means for stopping said driving means at the end of each cycle of operation upon the completion of the weld.

' 28. In an electric welding machine, a fixed work support and a movable work support, mechanically driven means to move said movable work support towards said fixed sup- ,12' 27. In a mechanically driven electric weld port, a brake normally preventing the operation of said movable Work support driving means, automatic means for releasing said brake, automatic means to set said brake at a predetermined time, for the purpose described. v

29. In an electric Welding machine, an arm, an electrode movably mounted on said arm a set screw on said arm engaging said electrode, and means to adjust said set screw to move the electrode on the arm and hold it against movement in one direction.

80. In an electric Welding machine,'an arm, an electrode having sliding tongue and groove connection with said arm, and means behind one end of the electrode to slidably adjust the electrode in its slidevvay.

31. In an electric Welding machine, an arm '1 having a. slideway, an electrode having" a tongue slidably engaging said slideWay, means behind one end of said slideWa-y to engage and slidably adjust the electrode in the slideway, and means forming one side i of said slideway for adjustably clamping the electrode tongue. I V

82. In an electric Welding machine for Welding together two pieces of Work by the combined flash and butt Weld method, a pair '55: of supports for said pieces of Work, and eX- tending pins carried by said supports for entering and positively properly positioning the pieces of WOIk upon the supports in a manner to compensate for the metal burned from said pieces of Work during the flashing operation of the machine. I

In testimony whereof I hereunto afiix my signature.

FRED P. MGBE'RT'Y'.

BEST AVNLABLE COP 

